During the second Advanced LIGO–Virgo observing run (O2), three binary black hole mergers were observed by the Advanced LIGO detectors [1]} on January 4, 2017—GW170104 [2]}, June 8, 2017—GW170608 [3]}, and August 23, 2017—GW170823 [4]} and four binary black hole mergers observed by the Advanced LIGO detectors and the Advanced Virgo detector[5]} on July 29, 2017—GW170729 [4]}, August 9, 2017—GW170809 [4]}, August 14, 2017—GW170814 [8]} and August 18, 2017—GW170818 [4]}. Including the binary black hole mergers observed in Advanced LIGO's first observing run [10]}, [11]} (O1), to date, there have been ten binary black hole mergers reported to have been detected by the Advanced LIGO–Virgo observatories [10]}, [11]}, [2]}, [3]}, [8]}, [4]}. The properties of these observed binary black hole sources (eg. masses and spins) are of interest to the astrophysics community to understand the formation, evolution, and populations of black holes. These properties are estimated using Bayesian inference [18]}, [19]} which allow us to sample the posterior probability density function—the probability of the modeled parameter values given a model and set of detectors' data. We perform a Bayesian inference analysis [20]}, [21]} using the available gravitational-wave data [22]} for GW170104, GW170608, GW170729, GW170809, GW170814, GW170818, and GW170823—the seven binary black holes reported from O2, and we present their posterior probability density functions in this paper. In particular, we present estimates for the masses, spins, distances, inclination angle, and sky locations of the binaries.
